Hi all,
I just posted this reply to someone on the raspberrypi.org forum who was
asking how to use small composite displays with the Raspberry Pi. I
thought I'd pass it along here. He also asked about HDMI, but I don't
know about that.
These small displays are low res, around 240 lines, and cheap, around $
20. So, don't expect iphone clarity or quality on it. But, if it meets
your needs, it might be just the thing. Some claim to be 640 x 480, but
reviewers say it's not so, so I don't know. Assume the worst. These
monitors do not support audio, so if you want that, you'll have to
provide separate speakers.
In the Raspberry Pi B+, they moved the composite video into the audio
jack. According to my reading, an ipod av cable such as the following
should work, although the left and right audio channels might be
reversed. Note that I said SHOULD work. I haven't had a chance to test
it, although I have one on order.
http://www.amazon.com/gp/product/B004UCU72U/
My forum post is below.
Sincerely,
Ron
--------------------
Hi Laurent,
I'm a new Pi (model B+) owner in the USA in the state of Georgia.
I spent hours the other night looking for all things Pi on Amazon. I
saved many dozens of links. One thing I was also looking for was a
cheap display.
The following links may help you. However, I HAVE NOT TRIED THESE
PRODUCTS, only read about them. Do your homework and read the amazon
reviews of each product you're interested in, particularly the ones that
mention raspberry pi.
http://www.amazon.com/AFUNTA-Rotating-Rearview-Satellite-Equipments/dp/B00J2PEGN6
This first listing has buttons where you can select 3.5", or 4.3" or 7"
monitors. I think most of the reviews are from the 3.5" model. In the
reviews, there is some fine print that tells which product was reviewed.
Here are some take away points I read in the reviews. This is just what
I think I understood, so don't take all this as absolute fact without
reading the reviews yourself.
*** You will need a separate 12v 2a center pin positive power supply for
the 3.5" monitor. The others may or may not be the same.
*** The connector for the power for the 3.5" monitor should be 2.1 x 5.5
mm female barrel on the unit, so your power supply would need a male one.
*** The unit is designed to connect directly to a car battery, which you
could do instead of using a power supply.
*** You may wish to tinker with fonts on the Pi to make things readable
on the small monitor. You have to get into the Linux display settings
to do this. See the reviews.
*** Some people said they could run the monitor on 9v. I'd go with 12v
unless you have a reason not to.
*** The device must have an active video signal to turn on the screen.
Otherwise, it stays blank.
*** The system is designed for a backup camera. If you put signals into
both the yellow and white connector, the white signal overrides yellow.
Here's a link where you can search for the 12v adapter. I cannot make a
specific recommendation at this point. If this doesn't work, just put
12 ac adapter into the amazon search box.
http://www.amazon.com/s/ref=nb_sb_sabc?url=search-alias%3Daps&pageMinusResults=1&suo=1405966015107#/ref=nb_sb_noss_2/180-2360007-0138408?url=search-alias%3Daps&field-keywords=12+ac+adapter&rh=i%3Aaps%2Ck%3A12+ac+adapter
Here's another 3.5" model:
http://www.amazon.com/3-5-Color-Screen-Rearview-Monitor/dp/B00FZM3JZQ
Here's another 4.3" model:
http://www.amazon.com/Digital-Reversing-Satellite-Receiver-Equipment/dp/B006MPRFJQ
Hope this helps. I'd be interested to know if you get and use one of
these, or if anyone else has tried them or something similar.
Sincerely,
Ron
--
(PS - If you email me and don't get a quick response, you might want to
call on the phone. I get about 300 emails per day from alternate energy
mailing lists and such. I don't always see new email messages very quickly.)
Ron Frazier
770-205-9422 (O) Leave a message.
linuxdude AT techstarship.com
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